Cells from a dog's kidney light up green when a fluorescent protein tags
transporter proteins embedded in the cell membranes. Transporter proteins
in the liver and kidney purge drugs and other chemicals from the body. Genetic
variations in these proteins can change how a person responds to medications.
Provided by Kathy Giacomini, a biologist at the University of California,
San Francisco. From PNAS 100: 5902-7. Copyright 2003 National Academy of
Sciences, U.S.A. Featured in the May 17, 2005, issue of Biomedical Beat.High res. image (237 KB JPEG)